Respirator Cartridge/Filter, Gas/Vapour Cartridge, Organic Vapour/Acid Gas/P100Pack of 2 Mask is recommended for use against methyl bromide at ambient concentrations up to 5 ppm and for not more than one shift NIOSH approved against certain organic vapours, chlorine, hydrogen chloride, sulfur dioxide, hydrogen sulfide, hydrogen fluoride and particulates Approved for use with 3M Half and Full Facepiece Respirators that use bayonet attachments The cartridge and filter are effective against particulate aerosols including